STR-DE875, STR-DE975 — Sony Audio Service Manual (repair manual)

Model
STR-DE875 STR-DE975
Pages
56
Size
18.76 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-de875-str-de975.pdf
Date

View Sony STR-DE875 / STR-DE975 Service Manual online

STR-DE875/DE975
US Model
Canadian Model
STR-DE875/DE975
AEP Model
UK Model
E Model
Chinese Model
Australian Model
STR-DE875
SERVICE MANUAL
FM STEREO FM-AM RECEIVER
9-873-911-14
2006B16-1
© 2006.02
— Continued on next page —
SPECIFICATIONS
Ver 1.3  2006. 02
Dolby Laboratories Licensing Corporation.
“DOLBY” the double-D symbol 
;
  “AC-3” and “PRO LOGIC”
are trademarks of Dolby Laboratories Licensing Corporation.
Photo : BLACK
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
AUDIO POWER
SPECIFICATIONS
POWER OUTPUT AND
TOTAL HARMONIC
DISTORTION:
With 8 ohm loads, both
channels driven, from 20 -
20,000 Hz; rated 110 watts
(STR-DE975) and 100 watts
(STR-DE875) per channel
minimum RMS power,
with no more than 0.09 %
total harmonic distortion
from 250 milliwatts to
rated output (USA model
only).
Amplifier section
Rated Power Output at Stereo mode
(8 ohms 20 Hz - 20 kHz,
THD 0.09%)
STR-DE975:
110 W + 110W
STR-DE875:
100 W + 100W
Reference Power Output
(8 ohms at 1 kHz, THD
0.7%)
STR-DE975:
Front
1)
: 110 W/ch
Center
1)
: 110 W
Surround
1)
: 110 W/ch
STR-DE875:
Front
1)
: 100 W/ch
Center
1)
: 100 W
Surround
1)
: 100 W/ch
1) Depending on the sound field settings and
sources, there may be no sound output.
Frequency response
PHONO: RIAA
equalization curve
±0.5 dB
Inputs (Analog)
PHONO:
Sensitivity: 4.0 mV
Impedance:
50 kilohms
S/N
a)
: 86 dB
(A, 4.0 mV
b)
)
MULTI CH IN,
CD/SACD, DVD/LD,
MD/DAT*, MD/TAPE**,
TV/SAT, VIDEO 1,
VIDEO 2 VIDEO 3*:
Sensitivity: 250 mV
Impedance: 50 kilohms
S/N
a)
: 96 dB(A, 250 mV
b)
)
a) Input short.
b) Weighted network, input level
US, Canadian MODELS
AEP, UK MODELS :
Rated Power Output at Stereo mode
(8 ohms 1 kHz, THD
0.7%)
100 W + 100 W
Reference Power Output
(8 ohms 1 kHz, THD
0.7%)
Front : 100 W/ch
Center : 100 W
Surround : 100 W/ch
Chinese MODEL :
Rated Power output at Stereo mode
(8 ohms 1 kHz, THD
0.7%)
90 W + 90 W
(at 220 V AC, 50 Hz)
100 W + 100 W
(at 230 V AC, 50 Hz)
Reference Power output
(8 ohms 1 kHz, THD
10% at 230 V AC, 50
Hz)
Front : 110 W/ch
Center : 110 W
Surround : 110 W/ch
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 
100 W + 100 W
Reference Power Output
(8 ohms 1 kHz, THD 
FRONT : 110 W/ch 
CENTER : 110 W
SURROUND : 110 W/ch
0.7 %)
10 %)
Others :
AEP, UK MODELS :
Others :
Frequency response
PHONO: RIAA
equalization curve
±0.5 dB
MULTI CH IN,
CD/SACD, MD/TAPE,
DVD/LD, TV/SAT,
VIDEO 1, VIDEO 2 :
10 Hz - 100 kHz +0.5/–3 dB
 (with sound field, 
and equalizer by passed)
MULTI CH IN,
CD/SACD, MD/DAT*,
MD/TAPE**,
DVD/LD, TV/SAT,
VIDEO 1, VIDEO 2
VIDEO 3*:
10 Hz - 50 kHz +0.5/–2 dB
 (with sound field 
and equalizer by passed)
2
STR-DE875/DE975
Harmonic distortion
0.5 % (50 mV/m,
400 Hz)
Selectivity
At 9 kHz: 35 dB
At 10 kHz: 40 dB
c) You can change the AM tuning interval to 9
kHz. After tuning in any AM station, turn
off the receiver. Hold down the PRESET
TUNING + button and press the 
?/1
button. All preset stations will be erased
when you change the tuning interval. To
reset the scale to 10 kHz, repeat the
procedure.
Video section
Inputs
Video: 1 Vp-p 75 ohms
S-video:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohms
Outputs
Video: 1 Vp-p 75 ohms
S-video:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohms
General
System
Tuner section:
PLL quartz-locked
digital synthesizer
system
Preamplifier section:
Low-noise NF type
equalizer
Power amplifier
section:
Pure-complementary
SEPP
Power requirements
120 V AC, 60 Hz
Power consumption
US MODEL :
STR-DE975: 270 W
In standby condition:
0.9 W
STR-DE875: 260 W
In standby condition:
0.9 W
Canadian MODEL :
Others :
STR-DE975: 350 VA
In standby condition:
0.9 W
STR-DE875: 340 VA
In standby condition:
0.9 W
AC outlets
2 switched, total
120 W/1A Max
Dimensions 430 
× 157.5 × 369 mm
(17 
× 6 1/8 × 14 4/8 in.)
including projecting
parts and controls
Mass (Approx.)
9.5 kg (20 lbs. 16 oz.)
Supplied accessories
Design and specifications are subject
to change without notice.
FM tuner section
Tuning range
87.5 - 108.0 MH
Antenna terminals
75 ohms, unbalanced
Intermediate frequency
10.7 MHz
Sensitivity
Mono: 18.3 dBf,
2.2 
µV/75 ohms
Stereo: 38.3 dBf
22.5 
µV/75 ohms
Usable sensitivity
11.2 dBf, 1 
µV/75 ohms
S/N
Mono:  76 dB
Stereo:  70 dB
Harmonic distortion at 1 kHz
Mono:  0.3%
Stereo:  0.5%
Separation
45 dB at 1 kHz
Frequency response
30 Hz - 15 kHz +0.5/–2
dB
Selectivity
60 dB at 400 kHz
AM tuner section
Tuning range
With 10-kHz tuning scale:
530 - 1710 kHz
c)
With 9-kHz tuning scale:
531 - 1710 kHz
c)
Antenna
Loop antenna
Intermediate frequency
450 kHz
Usable sensitivity
50 dB/m (at 1,000 kHz
or 999 kHz)
50 dB/m (at 999 kHz)
S/N
54 dB (at 50 mV/m)
• FM wire antenna (1)
• AM loop antenna (1)
• R6 (size-AA) batteries (2)
• US, Canadian model only
• Audio/video/control S connecting cord (1)
• Control S connecting cord (1)
• STR-DE975 only
• Remote commander RM-PP505L (remote) (1)
• STR-DE875 : US, Canadian, E, Malaysia, 
• Remote commander RM-PP505 (remote) (1)
EQ
BASS:
99 Hz~1.0 kHz
(21 steps)
MID:
198 Hz~10 kHz
(37 steps)
TREBLE:
1.0 kHz~10 kHz
(23 steps)
Gain levels:
±10 dB, 1dB step
Sampling Frequency
48 kHz (TV/SAT,
MD/DAT*,
MD/TAPE**
OPTICAL IN)
96 kHz (DVD/LD
OPTICAL IN,
COAXIAL IN)
* STR-DE975 only
** STR-DE875 only
Outputs
MD/DAT*,
MD/TAPE** (OUT);
VIDEO 1, VIDEO 2:
(AUDIO OUT):
Voltage: 250 mV,
Impedance: 10
kilohms
SUB WOOFER:
Voltage: 2 V
Impedance: 1
kilohms
PHONES:
Accepts low- and
high-impedance
headphones
Inputs (Digital)
DVD/LD (coaxial):
Sensitivity: –
Impedance: 75 ohms
S/N:  100 dB
(A, 20 kHz LPF)
DVD/LD, TV/SAT,
MD/DAT*,
MD/TAPE**
(Optical):
Sensitivity: –
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
 Singapore,  Chinese, Australian model only
• STR-DE875 : AEP, UK model only
• Commander, standard RM-U305A (remote)
d) You can change the AM tuning interval to
10 kHz. After tuning in any AM station,
turn off the receiver. Hold down the
TUNING + button and press the 
1/u
button. All preset stations will be erased
when you change the tuning interval. To
reset the scale to 9 kHz, repeat the procedure.
AEP, UK MODELS :
531 - 1602 kHz
E MODEL :
530 - 1610 kHz (10 kHz
step)
d)
531 - 1602 kHz (9 kHz
step)
d)
Others :
531 - 1602 kHz (9 kHz
step)
US, Canadian MODELS :
AEP, UK MODELS :
Others :
AEP, UK MODELS :
35 dB
Others :
US, Canadian MODELS :
AEP, UK MODELS :
E MODEL :
230 V AC, 50/60 Hz
120/220/240 V AC, 50/60 Hz
Australian MODEL :
240 V AC, 50 Hz
Others :
220-230 V AC, 50/60 Hz
220 W
In standby condition:
0.9 W
US, Canadian MODELS :
AEP, UK MODELS :
1 switched, max 100 W
E, Chinese MODELS :
Others :
2 switched, total 100 W max
1 switched, total 100 W max
3
STR-DE875/DE975
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 
0
 OR DOTTED LINE WITH
MARK 
0
 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
    After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
    The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY  CHECK-OUT
To Exposed Metal 
Parts on Set
0.15 
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
Parts No.
MODEL IDENTIFICATION
— BACK PANEL —
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 
0
 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
PARTS No.
4-232-578-0s
4-232-578-1s
4-233-045-0s
4-233-045-1s
4-233-045-2s
4-233-045-3s
4-233-045-4s
4-233-045-5s
4-233-045-6s
4-233-045-7s
MODEL
DE975:US model
DE975:Canadian model
DE875:US model
DE875:Canadian model
DE875:Australian model
DE875:Malaysia,Singapore model
DE875:Chinese model
DE875:E model
DE875:AEP model
DE875:UK model
4
STR-DE875/DE975
TABLE OF CONTENTS
1. GENERAL 
··········································································· 5
2. TEST MODE
······································································ 7
3. DIAGRAMS
3-1.
Circuit Boards Location ..................................................... 8
3-2.
Block Diagrams ................................................................ 10
• Main Section .................................................................. 10
• Power Section ................................................................ 11
3-3.
Printed Wiring Board – Digital Section – ........................ 12
3-4.
Schematic Diagram – Digital Section (1/4) – .................. 13
3-5.
Schematic Diagram – Digital Section (2/4) – .................. 14
3-6.
Schematic Diagram – Digital Section (3/4) – .................. 15
3-7.
Schematic Diagram – Digital Section (4/4) – .................. 16
3-8.
Printed Wiring Board – Main Section – ........................... 17
3-9.
Schematic Diagram – Main Section (1/3) – ..................... 18
3-10. Schematic Diagram – Main Section (2/3) – ..................... 19
3-11. Schematic Diagram – Main Section (3/3) – ..................... 20
3-12. Printed Wiring Board – Display Section – ....................... 21
3-13. Schematic Diagram – Display Section – .......................... 22
3-14. Printed Wiring Board – Video Section – .......................... 23
3-15. Schematic Diagram – Video Section – ............................. 24
3-16. Printed Wiring Board – Speaker Section – ....................... 25
3-17. Schematic Diagram – Speaker Section – ......................... 26
3-18. Printed Wiring Board – Power Section – ......................... 27
3-19. Schematic Diagram – Power Section – ............................ 28
3-20. IC Block Diagrams ........................................................... 29
3-21. IC Pin Function Description ............................................. 33
4. EXPLODED VIEWS
4-1.
Front Panel Section .......................................................... 36
4-2.
Chassis Section ................................................................. 37
5. ELECTRICAL PARTS LIST
······································· 39
Page of 56
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Download Sony STR-DE875 / STR-DE975 Service Manual (Repair Manual)

Here you can view online or download Sony STR-DE875 / STR-DE975 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony STR-DE875 / STR-DE975 Audio. Information contained in Sony STR-DE875 / STR-DE975 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).